In the Linux kernel, this vulnerability allows the bcm2835_asb_control() function to enter a tight polling loop, waiting for the ASB bridge acknowledgment. During high workloads, this handshake may fail, leading to runtime PM suspend errors. Consequently, the affected system may experience bus faults or hangs due to improper power-off states.
This vulnerability has a CVSS score of 5.5, classified as medium severity. The potential for availability impact is high, which makes it crucial for organizations to address this vulnerability promptly. The urgency level for remediation is medium, given that the vulnerability does not require a high privilege level or user interaction to exploit.
Organizations should prioritize patching immediately to prevent further impact, especially in environments that rely heavily on Linux kernel functionalities. As this vulnerability has not been confirmed to have known exploits or public proof of concepts, the focus should be on proactive remediation.
The Linux kernel versions affected include those starting from 5.1.1 up to 6.19.10, as well as the 7.0 release candidates. Organizations running any of these versions should evaluate their systems against the vulnerability and apply necessary patches.
It is recommended that organizations implement robust monitoring systems to detect any anomalies that may arise from this vulnerability and to ensure that their systems remain secure.
To assist in remediation, organizations can refer to the relevant patches available at the Linux kernel repositories.
Vulnerability Details
The vulnerability in question leads to potential failures during power management suspensions, specifically in the bcm2835_asb_control() function of the Linux kernel. The recent updates increase the polling timeout to appropriately handle various workloads, mitigating risks associated with the abrupt power-off states of the V3D master ASB.
The vulnerability is categorized under the medium severity level due to its availability impact and low attack complexity. The lack of user interaction and required privileges further underscores the importance of prompt remediation.
Technical Analysis
The root cause of this vulnerability lies in the insufficient timeout handling within the bcm2835_asb_control() function. The tight polling loop fails to acknowledge requests during high workload scenarios, leading to system instability.
This vulnerability has a low attack complexity, as it can be exploited locally without requiring significant privileges or user interaction. The impact on availability is high, as it can lead to system hangs or bus faults.
Risk & Impact Analysis
Risk to organizations includes the potential for system instability and operational downtime due to bus faults or hangs. The medium severity level indicates that while the vulnerability is not critical, it poses a significant risk that could disrupt operations, especially in environments reliant on Linux-based systems.
Organizations should assess their exposure, especially those utilizing affected Linux kernel versions. The urgency for remediation is medium, prompting organizations to schedule patching as part of their priority cycles.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The following Linux kernel versions are affected by this vulnerability: 5.1.1 to 5.10.253, 5.11 to 5.15.203, 5.16 to 6.1.167, 6.2 to 6.6.130, 6.7 to 6.12.78, 6.13 to 6.18.20, and 6.19 to 6.19.10.
Mitigation & Remediation
Organizations should ensure they apply the available patches to resolve this vulnerability. The patches can be found at the Linux kernel repositories. If immediate patching is not feasible, organizations should implement additional monitoring and access controls to mitigate potential risks.
For further assistance, organizations can refer to our penetration testing services to validate their security posture.
Detection Guidance
Monitoring logs for unusual activity during power state transitions can help identify potential exploitation attempts. Additionally, behavioral anomalies in system performance during high-load scenarios should be closely observed.
AppSecure Threat Intelligence Insight
The long-term significance of this vulnerability revolves around its impact on system availability. It highlights the need for continuous assessment of power management features in the Linux kernel, especially as workloads grow more intensive.
This incident reinforces the importance of timely patching and proactive monitoring. Security teams should be proactive in identifying and addressing similar vulnerabilities to maintain operational integrity.
For further reading on vulnerability management strategies, organizations can refer to our article on vulnerability management programs and best practices.
Additionally, organizations should consider our penetration testing methodology to strengthen their security posture.
Organizations should also stay informed about emerging threats and vulnerabilities to enhance their defensive strategies.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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